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L78C spark plug

Spark plug L78C - Properties, Compatibility and Alternatives

The L78C spark plug represents a reliable ignition component designed for specific automotive applications requiring precise combustion timing and efficient fuel burning. This L78C spark plug serves as a critical element in the engine's ignition system, creating the electrical spark necessary to ignite the air-fuel mixture within the combustion chamber. Modern vehicles depend on high-quality ignition components to maintain optimal performance and fuel efficiency.

Advantages of the Spark plug L78C

  • Enhanced combustion efficiency through optimized electrode design and Spark plug L78C configuration
  • Improved fuel economy resulting from complete fuel burn and reduced emissions output
  • Extended service life due to durable construction materials and L78C spark plug technology
  • Consistent ignition performance across various operating temperatures and engine loads
  • Reduced maintenance requirements through superior wear resistance properties
  • Compatible with modern engine management systems for optimal timing control

Technical Data

Feature Value
Manufacturer Champion
Model L78C
Type Standard copper core
Thread size 14mm
Thread length 19mm (3/4")
Wrench size 20.8mm (13/16")
Heat range 8 (hot)
Electrode gap 0.025" (0.635mm)
Resistance Non-resistor
Application Classic automotive engines

Compatibility and Areas of Application

The L78C spark plug demonstrates excellent compatibility with vintage and classic automotive engines, particularly those manufactured during the 1960s through 1980s era. This Spark plug L78C works effectively in carbureted engines that require non-resistor spark plugs for proper ignition system operation. The component fits seamlessly into restoration projects and classic car maintenance programs.

  • Classic American muscle cars with high-performance V8 engines
  • Vintage European sports cars requiring specific heat range characteristics
  • Restored vehicles with original ignition system configurations
  • Marine applications with compatible engine specifications

Suitable for the following vehicle models and equivalents

Alternative products can be found on AUTODOC, where over 7000 items are currently available in the spark plugs category.

Car maker Car Model
Ford Mustang (1965-1973)
Chevrolet Camaro (1967-1975)
Plymouth Barracuda (1970-1974)
Dodge Challenger (1970-1974)

Application Notes and Important Questions

  • What gap setting should be maintained for optimal performance with Spark plug L78C installations? The factory specification of 0.025 inches ensures proper spark formation and combustion efficiency.
  • How frequently should L78C spark plug components be inspected in classic vehicles? Regular inspection every 10,000 miles helps maintain consistent engine performance and prevents misfiring issues.
  • Can modern ignition systems accommodate this spark plug type? Compatibility depends on the specific ignition system design and whether resistor-type plugs are required for proper operation.
  • What torque specifications apply during installation procedures? Following manufacturer recommendations typically ranges between 25-30 foot-pounds to prevent thread damage.

Conclusion

The L78C spark plug provides reliable ignition performance for classic automotive applications requiring specific heat range and electrode gap characteristics. This component offers excellent value for restoration projects and vintage vehicle maintenance programs. Proper installation and maintenance of the L78C spark plug ensures optimal engine performance and longevity in compatible applications.

500 items
  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Copper Centre Electrode
  • Electrode Gap [mm]: 0,6
  • Spanner Size: 21 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 12,7
  • Spark Position [mm]: 1,5
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Packing Type: Box
  • Technical Information Number: L78C
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 8,65
  • Packaging width [cm]: 2,45
  • Packaging height [cm]: 2,45
  • Item number: L78C/T10
  • Manufacturer: CHAMPION
  • EAN number: 5010874503502
  • Condition: New
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CHAMPION CCH807 Spark plug L78C, M14x1.25, Spanner Size: 21 mm, Nickel GE
Article number: CCH807 Trade numbers: L78C
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  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Copper Centre Electrode
  • Electrode Gap [mm]: 0,6
  • Spanner Size: 21 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 12,7
  • Spark Position [mm]: 1,5
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Packing Type: Box
  • Technical Information Number: L78C
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 9,5
  • Packaging width [cm]: 2,2
  • Packaging height [cm]: 2,4
  • Item number: CCH807
  • Manufacturer: CHAMPION
  • EAN number: 37551000715
  • Condition: New
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Nickel Middle Electrode
  • Electrode Gap [mm]: 0,7
  • Spanner Size: 19 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 9,5
  • Spark Position [mm]: 3
  • Thread Size: M14x1.25
  • Connector type: SAE
  • Packing Type: Box
  • Technical Information Number: CJ8Y
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 9,5
  • Packaging width [cm]: 2,4
  • Packaging height [cm]: 2,2
  • Projection [mm]: 1,5
  • Item number: CCH848
  • Manufacturer: CHAMPION
  • EAN number: 37551001132
  • Condition: New
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Product version: New
  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Nickel Middle Electrode
  • Electrode Gap [mm]: 0,8
  • Spanner Size: 21 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 9,5
  • Spark Position [mm]: 1,5
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Technical Information Number: J17LM
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 16,72
  • Packaging width [cm]: 11,74
  • Packaging height [cm]: 10,7, 2,032
  • Item number: CCH845S
  • Manufacturer: CHAMPION
  • EAN number: 37551790371
  • Condition: New
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Nickel Middle Electrode
  • Electrode Gap [mm]: 0,5
  • Spanner Size: 19 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 9,5
  • Spark Position [mm]: 1,5
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Self-service suited packaging see parts list
  • Packing Type: Blister Pack
  • Technical Information Number: CJ6
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 14,3
  • Packaging width [cm]: 6,2
  • Packaging height [cm]: 2
  • Item number: CCH849C
  • Manufacturer: CHAMPION
  • EAN number: 37551011339
  • Condition: New
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Nickel Middle Electrode
  • Electrode Gap [mm]: 0,7
  • Spanner Size: 19 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 9,5
  • Spark Position [mm]: 3
  • Thread Size: M14x1.25
  • Connector type: SAE
  • Technical Information Number: CJ6Y
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 16,72
  • Packaging width [cm]: 11,74
  • Packaging height [cm]: 10,7
  • Projection [mm]: 1,5
  • Item number: CCH858S
  • Manufacturer: CHAMPION
  • EAN number: 37551161003
  • Condition: New
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In stock
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Copper Centre Electrode
  • Electrode Gap [mm]: 0,8
  • Spanner Size: 21 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 9,5
  • Spark Position [mm]: 1,5
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Packing Type: Box
  • Technical Information Number: RJ6C
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 9,5
  • Packaging width [cm]: 2,4
  • Packaging height [cm]: 2,2
  • Resistor from [kOhm]: 6
  • Resistor to [kOhm]: 15
  • Item number: CCH102
  • Manufacturer: CHAMPION
  • EAN number: 37551000524
  • Condition: New
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In stock
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Copper Centre Electrode
  • Electrode Gap [mm]: 0,8
  • Spanner Size: 21 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 9,5
  • Spark Position [mm]: 1,5
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Packing Type: Box
  • Technical Information Number: J8C
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 8,65
  • Packaging width [cm]: 2,45
  • Packaging height [cm]: 2,45
  • Item number: J8C/T10
  • Manufacturer: CHAMPION
  • EAN number: 5010874505407
  • Condition: New
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In stock
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Nickel Middle Electrode
  • Electrode Gap [mm]: 0,5
  • Spanner Size: 19 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 9,5
  • Spark Position [mm]: 3,4
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Packing Type: Box
  • Technical Information Number: CJ7Y
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 8,65
  • Packaging width [cm]: 2,45
  • Packaging height [cm]: 2,45
  • Projection [mm]: 1,5
  • Item number: CJ7Y/T10
  • Manufacturer: CHAMPION
  • EAN number: 5010874504219
  • Condition: New
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In stock
-44%
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with taper seat, Copper Centre Electrode
  • Electrode Gap [mm]: 0,9
  • Spanner Size: 16 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 17,5
  • Spark Position [mm]: 3
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Packing Type: Box
  • Technical Information Number: S9YC
  • Tightening torque from [Nm]: 15
  • Tightening torque to [Nm]: 20
  • Packaging length [cm]: 8,65
  • Packaging width [cm]: 2,45
  • Packaging height [cm]: 2,45
  • Projection [mm]: 1,5
  • Item number: OE009/T10
  • Manufacturer: CHAMPION
  • EAN number: 5010874505704
  • Condition: New
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In stock
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Copper Centre Electrode
  • Electrode Gap [mm]: 0,9
  • Spanner Size: 16 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 19
  • Spark Position [mm]: 3
  • Thread Size: M12x1.25
  • Connector type: SAE
  • Packing Type: Box
  • Technical Information Number: RA7YC
  • Tightening torque from [Nm]: 20
  • Tightening torque to [Nm]: 25
  • Packaging length [cm]: 8,65
  • Packaging width [cm]: 2,45
  • Packaging height [cm]: 2,45
  • Resistor from [kOhm]: 3
  • Resistor to [kOhm]: 8
  • Projection [mm]: 1,5
  • Item number: OE199/T10
  • Manufacturer: CHAMPION
  • EAN number: 4044197463398
  • Condition: New
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In stock
-28%
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Nickel Middle Electrode
  • Electrode Gap [mm]: 0,7
  • Spanner Size: 19 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 9,5
  • Spark Position [mm]: 3
  • Thread Size: M14x1.25
  • Connector type: SAE
  • Packing Type: Box
  • Technical Information Number: RCJ6Y
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 9,5
  • Packaging width [cm]: 2,4
  • Packaging height [cm]: 2,2
  • Resistor from [kOhm]: 6
  • Resistor to [kOhm]: 15
  • Projection [mm]: 1,5
  • Item number: CCH852
  • Manufacturer: CHAMPION
  • EAN number: 37551001040
  • Condition: New
Details
In stock
-50%
compared to RRP £6.00

£2.99
Price per item
£11.96 / Price per 4 items

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Sold by AUTODOC

Product version: New
  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Copper Centre Electrode
  • Electrode Gap [mm]: 0,9
  • Spanner Size: 21 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 19
  • Spark Position [mm]: 3
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Packing Type: Box
  • Technical Information Number: N9YC
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 8,65
  • Packaging width [cm]: 2,45
  • Packaging height [cm]: 2,45
  • Projection [mm]: 1,5
  • Item number: OE001/T10
  • Manufacturer: CHAMPION
  • EAN number: 5010874505605
  • Condition: New
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In stock
-40%
compared to RRP £5.02

£2.99
Price per item
£11.96 / Price per 4 items

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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Copper Centre Electrode
  • Electrode Gap [mm]: 0,7
  • Spanner Size: 16 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 12,7
  • Spark Position [mm]: 2,4
  • Thread Size: M10x1.0
  • Connector type: M4 / SAE
  • Packing Type: Box
  • Technical Information Number: P-RZ9HC
  • Tightening torque from [Nm]: 10
  • Tightening torque to [Nm]: 15
  • Packaging length [cm]: 8,65
  • Packaging width [cm]: 2,45
  • Packaging height [cm]: 2,45
  • Resistor from [kOhm]: 6
  • Resistor to [kOhm]: 15
  • Projection [mm]: 0,8
  • Item number: P-RZ9HC/T10
  • Manufacturer: CHAMPION
  • EAN number: 4044197440535
  • Condition: New
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, Nickel Middle Electrode
  • Electrode Gap [mm]: 0,6
  • Spanner Size: 19 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 9,5
  • Spark Position [mm]: 1,0
  • Thread Size: M14x1.25
  • Connector type: SAE
  • Technical Information Number: CJ8
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 16,72
  • Packaging width [cm]: 11,74
  • Packaging height [cm]: 10,7
  • Projection [mm]: -0,4
  • Item number: CCH843S
  • Manufacturer: CHAMPION
  • EAN number: 4060426472528
  • Condition: New
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In stock
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Nickel Middle Electrode
  • Electrode Gap [mm]: 0,8
  • Spanner Size: 21 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 9,5
  • Spark Position [mm]: 1,5
  • Thread Size: M14x1.25
  • Connector type: SAE
  • Technical Information Number: RJ19LM
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 16,72
  • Packaging width [cm]: 11,74
  • Packaging height [cm]: 10,7
  • Resistor from [kOhm]: 6
  • Resistor to [kOhm]: 15
  • Item number: CCH868S
  • Manufacturer: CHAMPION
  • EAN number: 37551121427
  • Condition: New
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In stock
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Nickel Middle Electrode
  • Electrode Gap [mm]: 0,8
  • Spanner Size: 19 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 9,5
  • Spark Position [mm]: 1,5
  • Thread Size: M14x1.25
  • Connector type: SAE
  • Packing Type: Box
  • Technical Information Number: CJ14
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 9,5
  • Packaging width [cm]: 2,4
  • Packaging height [cm]: 2,2
  • Item number: CCH846
  • Manufacturer: CHAMPION
  • EAN number: 37551000630
  • Condition: New
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Nickel Middle Electrode
  • Electrode Gap [mm]: 0,7
  • Spanner Size: 16 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 12,5
  • Spark Position [mm]: 3
  • Thread Size: M10x1.0
  • Connector type: M4 / SAE
  • Packing Type: Box
  • Technical Information Number: Z9Y
  • Tightening torque from [Nm]: 10
  • Tightening torque to [Nm]: 15
  • Packaging length [cm]: 8,65
  • Packaging width [cm]: 2,45
  • Packaging height [cm]: 2,45
  • Projection [mm]: 1,5
  • Item number: Z9Y/T10
  • Manufacturer: CHAMPION
  • EAN number: 4044197387472
  • Condition: New
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In stock
-45%
compared to RRP £6.01

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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Nickel Middle Electrode
  • Electrode Gap [mm]: 0,7
  • Spanner Size: 21 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 9,5
  • Spark Position [mm]: 1,5
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Technical Information Number: J19LM
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 16,72
  • Packaging width [cm]: 11,74
  • Packaging height [cm]: 10,7, 2,2
  • Item number: CCH861S
  • Manufacturer: CHAMPION
  • EAN number: 4060426472535
  • Condition: New
Details
In stock
-36%
compared to RRP £5.21

£3.29
Price per item
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Product version: New
  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Copper Centre Electrode
  • Electrode Gap [mm]: 0,8
  • Spanner Size: 21 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 12,7
  • Spark Position [mm]: 3
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Packing Type: Box
  • Technical Information Number: L92YC
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 8,65
  • Packaging width [cm]: 2,45
  • Packaging height [cm]: 2,45
  • Projection [mm]: 1,5
  • Item number: OE059/T10
  • Manufacturer: CHAMPION
  • EAN number: 5010874507517
  • Condition: New
Show OEM numbers of the product
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In stock
-31%
compared to RRP £5.21

£3.59
Price per item
£14.36 / Price per 4 items

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